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Title: firefox is unresponsive for the first 10-15 seconds after it gains focus Status in “firefox” package in Ubuntu: New Bug description: I keep firefox on its own desktop, and switch to it via a keybinding. This problem manifests itself even when switching focus via mouse on the same desktop, though. Basically every time I come back to firefox, it appears to ignore my input for a good long while. I am not seeing any swapping, and even the mouse cursor does not change in response to hover events. The effect goes away when I restart the browser, but slowly returns the longer I leave it running. This only started happening this weekend, and it happens in both unity 2d and 3d. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: firefox 11.0+build1-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12 Uname: Linux 3.2.0-20-generic x86_64 AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.95-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: nick 10792 F.... pulseaudio BuildID: 20120313141247 Channel: release Date: Mon Mar 26 10:04:10 2012 EcryptfsInUse: Yes ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback ProcEnviron: TERM=xterm LC_COLLATE=C PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash Profiles: Profile0 (Default) - LastVersion=11.0/20120313141247 (Running) RunningIncompatibleAddons: True SourcePackage: firefox UpgradeStatus: Upgraded to precise on 2012-02-06 (48 days ago) WpaSupplicantLog: dmi.bios.date: 06/25/2009 dmi.bios.vendor: LENOVO dmi.bios.version: 6DET55WW (3.05 ) dmi.board.name: 7465CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6DET55WW(3.05):bd06/25/2009:svnLENOVO:pn7465CTO:pvrThinkPadX200s:rvnLENOVO:rn7465CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 7465CTO dmi.product.version: ThinkPad X200s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/965073/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp